/* Copyright (C) 2004 - 2006  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
namespace Db4objects.Db4o.Internal.Btree
{
	/// <exclude></exclude>
	public class BTreeCancelledRemoval : Db4objects.Db4o.Internal.Btree.BTreeUpdate
	{
		private readonly object _newKey;

		public BTreeCancelledRemoval(Db4objects.Db4o.Internal.Transaction transaction, object
			 originalKey, object newKey, Db4objects.Db4o.Internal.Btree.BTreeUpdate existingPatches
			) : base(transaction, originalKey)
		{
			_newKey = newKey;
			if (null != existingPatches)
			{
				Append(existingPatches);
			}
		}

		protected override void Committed(Db4objects.Db4o.Internal.Btree.BTree btree)
		{
		}

		public override bool IsCancelledRemoval()
		{
			return true;
		}

		public override string ToString()
		{
			return "(u) " + base.ToString();
		}

		protected override object GetCommittedObject()
		{
			return _newKey;
		}
	}
}
